From patchwork Mon Aug 7 11:09:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13343622 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9F0FEB64DD for ; Mon, 7 Aug 2023 11:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232161AbjHGLPp (ORCPT ); Mon, 7 Aug 2023 07:15:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229541AbjHGLPY (ORCPT ); Mon, 7 Aug 2023 07:15:24 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3002030DD for ; Mon, 7 Aug 2023 04:14:02 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-267f32e89a5so665988a91.0 for ; Mon, 07 Aug 2023 04:14:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406791; x=1692011591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=urGrhHBCGKwKuhIkQmOHRuysXuy1mToQA+AaHWoY6PY=; b=gvEcin7S0wJ5rW0wtj9WnWp/4gO3FOqyEc5Qy3KVjjCOMIdl063r7goatTKMU5K63u IABDDkTZbyMiPq/rwoG72XrgfLWlV6/YJwymkZtRfBVcrDOzJOk+V88T6EEEXGW6nfh0 le0xVwnZY7As0nXjZy+hSjIWRCXvYGRHiEKZrDZnQb7QflVpjM7uq/81aSxj3traKDGt VXa/baYLLxxBhWBawSSBHT4dMsZ/NRoyUnn0XTD8JWz4/O0ULe9Suh4wohOUxiotc5cA +kJEwQbIJfS1Vrk1T3/Loi8TKjO+pow/TrGBcBE2xp4OSLxBFU0bCUPycoGAdA8SsoOk yeOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406791; x=1692011591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=urGrhHBCGKwKuhIkQmOHRuysXuy1mToQA+AaHWoY6PY=; b=G1BCYKnrF+zGuSx0CXXfdtht5dCStXsebn9A7ZwEAy7Jg4RfiZ8/ChHgybqEEQfERk 6Ht1P41nK1bKxsabjhZV+QKb/+NosZmjOKNwjzeAeBAP9jiEdCjrvemjmgbzvlCiqucg 1b/x0ynCZDYoy+DJGyxVWLSCfPZPx94Hwju3GaNoCCb8CckB5J3cefSt9R7NrFn4CAky OrDFt1AC5FsFi3LOy783m8WFN8bjOD9POIMNfpXUXha1OzI9sx3UPq3A0ZUmcdL3AaUR pl0DPx1hUxv26fKEeElx68VAJcqR6wFBM5RP2vWuW9Xkh0CEckCd9PrDhFrmmQc7E8Ee fiAA== X-Gm-Message-State: ABy/qLaW5MOHHWNo0aVHaLEHHami4MO9599htE5zhhICZh5KnxyhFtnP 5sEZ2n+7UU+MSMKQNOSnX4BfGQ== X-Google-Smtp-Source: APBJJlGG9fl/KZM7Wu/aB3nA3qPBXzAgCls0ii/X4UboFM2rQSd7zbDq190u8vBbdPOZ8QFUsdy1lw== X-Received: by 2002:a17:90a:faf:b0:268:abc:83d5 with SMTP id 44-20020a17090a0faf00b002680abc83d5mr23478200pjz.4.1691406791204; Mon, 07 Aug 2023 04:13:11 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:13:10 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 15/48] nfsd: dynamically allocate the nfsd-filecache shrinker Date: Mon, 7 Aug 2023 19:09:03 +0800 Message-Id: <20230807110936.21819-16-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Use new APIs to dynamically allocate the nfsd-filecache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfsd/filecache.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index ee9c923192e0..9c62b4502539 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -521,11 +521,7 @@ nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc) return ret; } -static struct shrinker nfsd_file_shrinker = { - .scan_objects = nfsd_file_lru_scan, - .count_objects = nfsd_file_lru_count, - .seeks = 1, -}; +static struct shrinker *nfsd_file_shrinker; /** * nfsd_file_cond_queue - conditionally unhash and queue a nfsd_file @@ -746,12 +742,19 @@ nfsd_file_cache_init(void) goto out_err; } - ret = register_shrinker(&nfsd_file_shrinker, "nfsd-filecache"); - if (ret) { - pr_err("nfsd: failed to register nfsd_file_shrinker: %d\n", ret); + nfsd_file_shrinker = shrinker_alloc(0, "nfsd-filecache"); + if (!nfsd_file_shrinker) { + ret = -ENOMEM; + pr_err("nfsd: failed to allocate nfsd_file_shrinker\n"); goto out_lru; } + nfsd_file_shrinker->count_objects = nfsd_file_lru_count; + nfsd_file_shrinker->scan_objects = nfsd_file_lru_scan; + nfsd_file_shrinker->seeks = 1; + + shrinker_register(nfsd_file_shrinker); + ret = lease_register_notifier(&nfsd_file_lease_notifier); if (ret) { pr_err("nfsd: unable to register lease notifier: %d\n", ret); @@ -774,7 +777,7 @@ nfsd_file_cache_init(void) out_notifier: lease_unregister_notifier(&nfsd_file_lease_notifier); out_shrinker: - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); out_lru: list_lru_destroy(&nfsd_file_lru); out_err: @@ -891,7 +894,7 @@ nfsd_file_cache_shutdown(void) return; lease_unregister_notifier(&nfsd_file_lease_notifier); - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); /* * make sure all callers of nfsd_file_lru_cb are done before * calling nfsd_file_cache_purge